Went with the Makita 36v. got one in the arborist configuration. At my work we continually destroyed milwaulkee and dewalt wares. Our employees on the orchard could destroy everything but the Makita tools held up well.

So I got a Makita elec arborist saw which works as well as my old Stilh gas aborists saw with no gas and I have plenty of other 18v batteries from my other tools.